package apiday03;
import java.util.ArrayList;
import java.util.Collection;
// 集合间操作练习
public class CollectionOperDemo {
    public static void main(String[] args) {
        Collection c1 = new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("c1:"+c1);

        Collection c2 = new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");
        System.out.println("c2:"+c2);

        c1.addAll(c2);
        System.out.println("c1:"+c1);
        System.out.println("c2:"+c2);

        Collection c3 = new ArrayList();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        System.out.println("c3:"+c3);

        boolean contains = c1.containsAll(c3);
        System.out.println("包含所有："+contains); // false

        /*
        c1.removeAll(c3);
        // 取交集,c1中仅保留c1与c3的共有元素,c3不变
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);
         */

        // 删交集
        c1.removeAll(c3);
        System.out.println("C1:"+c1);
        System.out.println("c3:"+c3);
    }
}
